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CURRENT AFFAIRS
Description
The NASA-ISRO Synthetic Aperture Radar (NISAR) is set to help researchers better understand how changes in Earth's forest and wetland ecosystems affect the global carbon cycle and climate change.
About NASA-ISRO Synthetic Aperture Radar (NISAR)
NISAR is a Low Earth Orbit (LEO) observatory jointly developed by NASA and ISRO.
It is a satellite the size of an SUV that weighs 2,800 kilograms.
It consists of both L-band and S-band Synthetic Aperture Radar (SAR) instruments, making it a dual-frequency radar satellite.
NISAR will be the first satellite mission to use two different radar frequencies (L-band and S-band) to measure changes in our planet's surface.
SAR can penetrate clouds and collect data day and night, regardless of weather conditions. NASA provided the L-band radar, GPS, a high-capacity solid-state recorder to store data, and a payload data subsystem. ISRO provided the S-band radar, GSLV launch system, and spacecraft.
It also consists of a large 11-meter-long fixed antenna reflector, made of gold-plated wire mesh, which will be used to “focus the radar signals transmitted and received from the ascending feeder onto the instrument structure.
Objectives of the Mission
It will measure changes in Earth's ecosystems, dynamic surfaces, and ice masses and provide information on biomass, natural hazards, sea level rise, and groundwater.
NISAR will observe Earth's land and ice surfaces around the world at 12-day intervals during ascending and descending passages.
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